JPH0126572Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of application of the invention] This invention relates to a tray-shaped packaging box assembled from blanks such as corrugated boards. A side panel and an end panel that constitute the side and end faces of the same hexahedron, respectively, are raised from the panel, and an insertion flap extending from the side panel or the end panel is inserted into a slit made in the side of the adjacent end panel or side panel, The present invention relates to a packaging box in which side panels and end panels are fixed to each other.

[Prior art]

For example, as a conventional box of this type,
Some examples include those shown in Publication No. 16391. This box is
As shown in Figs. 1 and 2, in the blank shown in Fig. 1, first start with the bottom panel 1 that forms the bottom surface of the hexahedron, and construct the side and end surfaces of the hexahedron along the folded line shown by the two-dot chain line. Fold the side panels 2, 2 and end panels 3, 3 inward (based on the completed box, the same applies hereinafter), and insert the tips of the insert flaps 4, 4... extending from the side panels 2, 2 into the ends. Slits 5 and 5 opened in panels 3 and 3...
By inserting it into the box, it is assembled into a box as shown in Figure 2.

In this type of box, the side panels 2, 2 and the end panels 3, 3 are fixed only by the above-mentioned fitted state of the insert flaps 4, 4..., so it is extremely fragile, and If some force is applied towards the box, the above-mentioned fitted state may easily come off and the box may disassemble. Therefore, even in the box above,
Another inner flap 6, 6 is extended inside the end panels 3, 3, . It is inserted into the opened slits 8, 8, and fixed. As a result, the end faces are reinforced and at the same time the insert flaps 4, 4...
is held between the inner flaps 6, 6 and the end panels 3, 3.

[Problem that the invention attempts to solve]

However, even with the structure described above, the bonding strength between the side panel 2 and the end panel 3 is not necessarily sufficient because it depends only on the frictional resistance that the insertion flap 4 receives from the slit 5, etc.
It is desired to provide a box that is not easy to assemble but has higher strength. In particular, in the conventional box, the insertion flap 4 comes out of the slit 5,
There was a problem with the box being easy to disassemble.

SUMMARY OF THE INVENTION In view of the problems in the prior art described above, it is an object of the present invention to provide a durable tray-shaped packaging box in which an insertion flap can be easily inserted and will not easily come out once inserted.

[Means to solve the problem]

That is, the object of the present invention is to provide a tray-shaped packaging box with an inner flap 20 that extends from the end panel 13 and attaches to the inner surface thereof, and to extend from both sides of this inner flap 20 and another panel facing the same flap 20. The joining flaps 23 and 29 are each extended,
These joint flaps 23 and 29 are attached to the inside of the side panel 12 and connected, and the flaps 23 and 29 are attached to the side panel 12 and the inner flap 16 thereof.
This is achieved by inserting it between the

[Effect]

In the tray-type packaging box according to the present invention, a joining flap 23 attached to the inside of the side panel 12;
29 interconnects and secures the end panel 13 with the opposing partition panel 19. Then, the joining flaps 23, 2 in this connected state
9 is sandwiched between the side panel 12 and its inner flap 16 and cannot be easily separated from the outside. For this reason, once the box is assembled, the plug-in flap 14 inserted into the slit 15 in the side panel 12
A durable tray-shaped packaging box can be made without easily falling out.

〔Example〕

FIGS. 3 and 4 show an embodiment in which the present invention is applied to a double-type packaging box.

The blank for this packaging box is made by punching out a sheet of paperboard along solid lines and making fold lines at predetermined locations indicated by two-dot chain lines. In this blank, two sets of bottom panels 11 are provided,
The bottom panels 11 are connected to each other by a continuous partition panel 19 via a fold line. On the other hand, bottom panel 1
A side panel 12 and an end panel 13, which constitute the side and end surfaces of the hexahedron, extend from the other three sides of the hexahedron through broken lines, respectively.

The following description will be based on FIG. 3 unless otherwise specified.

A plug-in flap 14 extends upwardly and downwardly from the end panel 13. This insertion flap 14
The tip is slightly rounded to facilitate insertion, and a barb-like step 21 is provided at the base of the tip.

On the other hand, a slit 15 is provided in the vertical direction at a location corresponding to the insertion flap 14 of the side panel 12. In addition, an inner flap 16 extends from the side panel 12 to the upper and lower sides in FIG. 1 via two parallel fold lines, and further extends from the inner flap 16 to the left and right sides in FIG. A joining flap 23 extends through it. Projections 24 are provided from the upper and lower sides of the inner flap 16. On the other hand, a slit 26 is formed on the fold line between the side panel 12 and the end panel 13 of the bottom panel 11.

A partition slit 28 is cut in the center of the partition panel 19 in the horizontal direction.
9, a joining flap 29 extends upwardly and downwardly via broken lines, respectively. Further, a partition plate 30 is separated from a portion surrounded by the joining flap 29 and the inner flap 16, and a partition slit 31 is cut into the partition plate 30.

Note that the end panels 13 and the partition panels 19 are both at the same height, but the central part of the side panel 12 has a notch 3 cut out one step lower than the other parts.
It has become 2. In addition, a small section centered on the fold line between the same panel 12 and the insertion flap 14,
It is slightly higher than other parts.

When assembling this blank as a box, first cut out the partition plate 30, then fold the fold lines at the boundaries of the partition panel 19 outward (based on the box to be assembled; the same applies hereinafter), and then fold all the fold lines inward. Fold it to Then, the inner flap 16 and the protrusion 24 of the joining flap 23 are fitted into the slit 26. Furthermore, the tip of the insertion flap 14 is inserted into the slit 15. On the other hand, the partition plate 30 is inserted into the partition panel 19 and fixed so that the partition slit 31 is engaged with the partition plate 28.

As shown in FIG.
2 and end panel 13 are fixed to each other. At the same time, the inner flap 1 constituting the inner wall of the end face
6 is fixed to the bottom panel 11 by inserting its protrusion 24 into the slit 26.

The packaging box is divided into four parts by a partition panel 19 and a partition plate 30. Further, the raised portion extending between the side panel 12 and the insertion flap 14 becomes a rising portion 33 of the corner.

In addition, in this embodiment, the inner flap 20 can be opened not only from the side panel 12 but also from the end panel 13.
may be extended, and a joining flap 23 may be extended from this inner flap 20. In this case, a V-shaped notch 3 is provided on the distal end side of the joining flap 23.
4 is cut out, and a corresponding notch 35 is also cut in the insert flap 29. In this case, the assembly involves joining the joining flap 23 which is bent from the inner flap 20 constituting the inner wall of the side surface to the end surface side.
The notches 34 and 35 are engaged with each other to join the joining flap 29 bent from the partition panel 19 toward the end face side. The joined flaps 23 and 29 are sandwiched between the end panel 13 and the inner flap 16 so that they cannot be seen from either the inside or the outside of the box.

[Effect of idea]

As explained above, according to this invention, not only the insertion flap 14 is used for joining, but also the joining flap 23 that extends integrally with the inner flap 20 constituting the inner wall of the end face, and the panel facing the inner flap 20. The connecting flaps 29 extending from the connecting flaps 29 are connected to each other. These are then sandwiched and fixed between the side panel 12 and the inner flap 16 thereof. This makes it possible to provide a durable tray-shaped packaging box that is difficult to disassemble once assembled.

[Brief explanation of the drawing]

Fig. 1 is a developed view showing a conventional example of a tray-shaped packaging box, Fig. 2 is a perspective view of the same assembled state, and Fig. 3 is an exploded view showing a conventional example of a tray-shaped packaging box.
The figure is a developed view showing an embodiment of this invention, and FIG. 4 is a perspective view of the assembled state. 11...bottom panel, 12...side panel, 13...end panel, 14...insertion flap, 15...slit,
16, 20...Inner flap, 23, 29...Joining flap.

Claims (1)

[Scope of utility model registration request] The side panels 12 and end panels 13, which respectively constitute the side and end surfaces of the hexahedron, are raised from the bottom panel 11 which constitutes the bottom surface of the hexahedron, and the end panel 1
In a tray-shaped packaging box formed by inserting and fixing insert flaps 14 extending from both sides of 3 into slits 15 formed in an adjacent side panel 12,
An inner flap 20 attached to the inner surface of the end flap 13 extends from the end flap 13, and joining flaps 23, 29 extending from both sides of the inner flap 20 and the other panel facing the same flap 20 are attached to the side panel 12.
A tray-shaped packaging box characterized by being attached to the inside of the side panel 12 and connecting these together, with joining flaps 23 and 29 being sandwiched between the side panel 12 and the inner flap 16 thereof.